package com.sword.spring.rabbitmq.d_routing;

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.sword.spring.rabbitmq.c_publish_subscribe.EmitLog;

import java.io.IOException;
import java.util.Scanner;
import java.util.concurrent.TimeoutException;

/**
 * com.sword.spring.rabbitmq.d_routing.EmitLogDirect
 * Created by SwordLiu on 2017-11-03.
 */
public class EmitLogDirect {

    private static final String EXCHANGE_NAME = "direct_logs";

    public void send(String[] argv) throws IOException, TimeoutException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.DIRECT);

        String severity = getSeverity(argv);
        String message = getMessage(argv);

        channel.basicPublish(EXCHANGE_NAME, severity, null, message.getBytes("UTF-8"));
        System.out.println(" [x] Sent '" + severity + "':'" + message + "'");

        channel.close();
        connection.close();

    }
    private static String getSeverity(String[] strings){
        if (strings.length < 1)
            return "info";
        return strings[0];
    }

    private static String getMessage(String[] strings){
        if (strings.length < 2)
            return "Hello World!";
        return joinStrings(strings, " ", 1);
    }

    private static String joinStrings(String[] strings, String delimiter, int startIndex) {
        int length = strings.length;
        if (length == 0 ) return "";
        if (length < startIndex ) return "";
        StringBuilder words = new StringBuilder(strings[startIndex]);
        for (int i = startIndex + 1; i < length; i++) {
            words.append(delimiter).append(strings[i]);
        }
        return words.toString();
    }

    public static void main(String[] args) throws IOException, TimeoutException {
//        new EmitLogDirect().send(new String[]{"error", "Run. Run. Or it will explode."});
//        new EmitLogDirect().send(new String[]{"warning", "Run. Run. Or it will explode."});
//        new EmitLogDirect().send(new String[]{"info", "Run. Run. Or it will explode."});
        new EmitLogDirect().send(new String[]{"Run. Run. Or it will explode."});
    }

}
